Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes

Bin Ji, Cheng Liu, Jiechao Liang and Jian Wang
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Bin Ji: Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, China
Cheng Liu: Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, China
Jiechao Liang: Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, China
Jian Wang: Department of Water and Wastewater Engineering, Wuhan University of Science and Technology, Wuhan 430065, China

IJERPH, 2021, vol. 18, issue 13, 1-11

Abstract: Urban freshwater lakes play an indispensable role in maintaining the urban environment and are suffering great threats of eutrophication. Until now, little has been known about the seasonal bacterial communities of the surface water of adjacent freshwater urban lakes. This study reported the bacterial communities of three adjacent freshwater lakes (i.e., Tangxun Lake, Yezhi Lake and Nan Lake) during the alternation of seasons. Nan Lake had the best water quality among the three lakes as reflected by the bacterial eutrophic index (BEI), bacterial indicator ( Luteolibacter ) and functional prediction analysis. It was found that Alphaproteobacteria had the lowest abundance in summer and the highest abundance in winter. Bacteroidetes had the lowest abundance in winter, while Planctomycetes had the highest abundance in summer. N/P ratio appeared to have some relationships with eutrophication. Tangxun Lake and Nan Lake with higher average N/P ratios (e.g., N/P = 20) tended to have a higher BEI in summer at a water temperature of 27 °C, while Yezhi Lake with a relatively lower average N/P ratio (e.g., N/P = 14) tended to have a higher BEI in spring and autumn at a water temperature of 9–20 °C. BEI and water temperature were identified as the key parameters in determining the bacterial communities of lake water. Phosphorus seemed to have slightly more impact on the bacterial communities than nitrogen. It is expected that this study will help to gain more knowledge on urban lake eutrophication.

Keywords: eutrophication; bacterial community; 16S rRNA gene; seasonal changes; bacterial eutrophic index; nitrogen to phosphorus ratio (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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